ABεΥʤȤꡢƱȤƹͤޤ
ȺεפϡȾ4cmαߡ
ǾεפϡȾ1cmαߡ
äơ(4*4-1*1)*3.14=47.1cm^2
ŷϿ͡ 729ڡ 0:15:32 36513
cyclone
Ⱦ4αߤǴְ㤤ʤȻפäƤޤ
Ⱦ1αߤʬϽǤ͡
729ڡ 0:39:40 36514
Taro
#36513
ۤɵ#36513Ʊͤ˹ͤ餢äȤ֤˲򤱤ޤ
729ڡ 0:58:20 36515
abcba@jugglermoka
#36514
ʬȾ4αߤȻפޤ

2ĤαߤȾ¤줾A,A+2aǤ
A(A+2a)3.14ˤʤ롣
2ĤαߤȾ¤Ѥ3.14ݤΤȤϥ쥬ȤǤ͡
729ڡ 1:14:50 36516
kasama
Фܤ뤫ȻפޤǤ⡢ޤȤ=(;Aե
Ⱦ£αߤ̤ƤΤǤ͡äȵդޤ
²λ 729ڡ 1:33:52 36517
⡼ޥ
錄...ľ£αߤ...
ľ3αߤ˳ܤưƤ櫓Ǥ...
Ǥ...ľ5αߤưȹͤ...٤Ƥư㤦...^^;
ɤ...?
729ڡ 1:42:53 36518
ͣ.ǥ
äơȾ4αߤɤΤͤƤ顢Ⱦ1αߤФ褤Ȥ
Ƭ⤫ӡΤΤƲǤ
줫鿲ľGood night Zzzzzzz
729ڡ 2:38:50 36519
im
Ⱦ£αߤȻפä顤꤬Ƥ
729ڡ 4:37:18 36520
meiche
QꤷȾ3/2αߤǤ롣
ɤQưȤȾ3/2αߤ濴Ⱦ5/2α߼ư
729ڡ 5:01:06 36521
ݤä
ABפü첽ޤ
α 729ڡ 8:10:23 36522
ϥ饮㡼ƥ
ߤƱ褦Ǥ褦ǤƱߤˤޤ
729ڡ 10:31:12 HomePage:ϥ饮㡼ƥ湩36523
uchinyan
Ϥˤϡơϡ
ϡ򤤤褦ʵޤ AB ͿƤʤΤǡü첽Ʋ򤯤ΤڤǤ͡
ǤϡľϤȤ⤫ܤΤϡݤʡ㴳ϰϤĶ롩褦ʵޤ

PQ ξƱưȤ䤳ʤΤǡޤϡP ꤷ Q ưޤ
P B ľPB B Ȥθ P ˶ᤤ CD Ȥޤ
ˡQ C ˰פȤ M EQ D ˰פȤ M F ȤޤE PC F PD Ǥ
ȡǤդ Q ФơCQD = 90ǡ
PM = QMPE = EC ME//QCPM = QMPF = FD MF//QDʤΤǡ
EMF = CQD = 90ˤʤꡤM EF ľ¤Ȥߤޤ
ΤȤαߤ濴 EF Ǥ N Ȥޤơ
ߤȾ = EN = FN = EF/2 = (PF - PE)/2 = (PD/2 - PC/2)/2 = (PD - PC)/4 = CD/4 = BC/2 = 5/2 cm
ޤPN = PE + EN = PC/2 + EF/2 = PC/2 + BC/2 = PB/2 ʤΤǡN PB Ǥ
ޤǤǡP ꤷˡM ϡ濴 NȾ 5/2 cmαߤȤʬޤ
ˡP ưޤ
A B ľAB A Ȥθ B GH Ȥޤ
ˡP G ˰פȤ N IP H ˰פȤ N J ȤޤI BG J BH Ǥ
ȡۤɤƱ褦ˤơǤդ P ФơGPH = 90ǡ
PN = BNGI = BI NI//PGPN = BNHJ = BJ NJ//PHʤΤǡ
INJ = GPH = 90ˤʤꡤN IJ ľ¤Ȥߤޤ
ΤȤαߤ濴 IJ Ǥ O Ȥޤơ
ߤȾ = IO = JO = IJ/2 = (BI - BJ)/2 = (BG/2 - BH/2)/2 = (BG - BH)/4 = GH/4 = AG/2 = 3/2 cm
ǡN 濴 N ϡ濴 OȾ 3/2 cmαߤȤʬޤ
ʾǡɡM εפϡ濴 O Ⱦ 3/2 cm α߼濴 N Ⱦ 5/2 cm αߡʬޤ
ϡưƤߤФΤǤ
O ֱ󤤤ΤϡȾ 5/2 + 3/2 = 4 cm αߡO ֶᤤΤϡȾ 5/2 - 3/2 = 1 cm αߡ
ʤΤǡO 濴ȤȾ 4 cm αߤ顤O 濴ȤȾ 1 cm αߤɡʥķϰϤǤ
ǡ4 * 4 * 3.14 - 1 * 1 * 3.14 = 15 * 3.14 = 47.1 cm^2 ˤʤޤ

βˡǤϡäꤷơǸȾ 1 cm αߤΤ˺Ƥޤ⤷ޤ󡣼¤ϡ䤬Ǥ (^^;
ǽ Q ꤷ Q ưȹͤȡM εפϡȾ 5/2 cm α߼濴Ⱦ 3/2 cm αߡȤʤޤ
츫äƸޤºݤưƤߤСưϰϤϤƱˤʤޤ
⡤濴ƱȾ 4 cm αߤȾ 1 cm αߤɡʥķϰϤˤʤΤϡʬ䤹褦Ǥ

ʤؤˤʤޤɸȤΤʬ䤹Ǥ͡
ͥνȡ 729ڡ 21:27:38 MAIL:uchi@sco.bekkoame.ne.jp 36524
uchinyan
ǼĤɤߤޤ

濴ƱȾ 4 cm αߤȾ 1 cm αߤɡʥķϰ
ϤƱǤܺ٤βˡν񤭹ߤʤΤȾǤΤ褦Ǥ
ΤǽλĤϡäꤹȡȾ 1 cm αߤΤ˺ƤޤǽꤽǤ

#36514#36516#36517#36518#36519#36520#36523
ˡ#36513ʤɤ#36524ʤɤΤɤ餫Ȼפޤ

#36513#36515#36522
A B פʤɤΡ餫ü첽ˤˡ
ü첽פ餷Ҥ˸¤ꡤʬˤޤ

#36524
ޤ P ꤷ P ươȾ 3/2 cm α߼濴Ⱦ 5/2 cm αߡˡ

#36521#36524κǸդ
ޤ Q ꤷ Q ươȾ 5/2 cm α߼濴Ⱦ 3/2 cm αߡˡ

ĿŪˤϡزˡʤäΤϡʳǤ

ʤ

#36516
亣2ĤαߤȾ¤줾A,A+2aǤ
A(A+2a)3.14ˤʤ롣
ȡɤʤ顤ĤαߤȾ¤ ab Ȥ ab ˤʤ롤줤ʤ
2ĤαߤȾ¤Ѥ3.14ݤΤȤϥ쥬ȤǤ͡
ΤˤǤ͡
ͥνȡ 729ڡ 13:57:23 MAIL:uchi@sco.bekkoame.ne.jp 36525
meiche
QꤷȾ3/2αߤǤ롣
ɤQưȤȾ3/2αߤ濴Ⱦ5/2α߼ư
729ڡ 14:02:24 36526
meiche
ߤޤ󡢹򤷤ƤˤʤäƤޤޤ
729ڡ 14:03:53 36527
abc
زˡˤʤޤ٥ȥˤˡ񤤤Ƥߤޤ
A,B,P,Q,Mγư֥٥ȥV(a),V(b),ĤΤ褦ɽȤˤޤ
|V(m)-{V(a)+v(b)}/2|=|{v(p)+v(q)}/2-{v(a)+v(b)}/2|
=|{V(p)-V(a)}/2+{V(q)-V(b)}/2|ĭ
ˤĤƼλΩޤ
|{V(q)-V(b)}/2|-|{V(p)-V(a)}/2|孡|{V(p)-V(a)}/2|+|{V(q)-V(b)}/2|
(դȱդϤ줾졢{V(q)-V(b)}{V(p)-V(a)}θ
ոƱΤȤΩġ
5/2-3/2孡3/2+5/21孡4 (衡)
äơM¸ΰϡʬAB濴ȤȾ4αĤ顢濴ƱȾ1αĤΤˤʤޤ


729ڡ 15:32:18 36528
hide
䤺뤤ʤǤʤǤäѤü첽ᤤǤ͡
ABפƲ򤭤ޤ
729ڡ 16:30:57 36530
(Keigei)
ؤDz򤯤ȡΤñȻפޤ
P(3cos,3sin), Q(2b5cos,5sin), M(x,y)Ȥȡ
2x3cos2b5cos, 2y3sin5sin¡
(2x2b)^2(2y)^23430cos(ݦ)
4(2x2b)^2(2y)^2641(xb)^2y^216
729ڡ 17:52:50 36531
Ȥ
ͥåȤǡ߼塡סǸ
2ߤα߼μͳε
ȤȤȯ
2ʬǰʲη׻ǰȯǤޤ

((3+5)/2)^2*3.14-((5-3)/2)^2*3.14=47.1()
˭ԡ 729ڡ 20:40:36 MAIL:fttnm528@ybb.ne.jp 36532
Ѥ
ĤΤ褦ʣűߤޤ
ϥϡ 729ڡ 21:50:19 HomePage:֤ä36533
Ѥ
#36518
ֱ߼פεפʤΤ濴˷ޤ衣
ǽȤޤ
ϥϡ 729ڡ 21:54:42 HomePage:֤ä36534
ɥ
ǰץ˹ͤФǤΤˡ
729ڡ 23:43:46 36535
X
ʣݣˤȴ㤤Ƥޤ
730ʶ 6:10:36 36536
ϲ
ü첽ȴñɡ
81 14:25:44 36537
ɡǤ
񤷤ͧãʤɡɤˤʤɤ̤ƤäȽ褿
Ǥ 81 23:27:00 36538
ɡɤ
82ʷ 21:57:24 36539
ɡǤ
ʤˤ֤꡼פʤǤ
Ǥ 83ʲС 22:17:08 36540